pH Sensor InPro4800i/SG/225 Back Catalog number: 52005384 Availability: In the manufacturer's stock Price on request - + Recommended MA919B/1 Glass pH electrode, refillable, BNC, 1m Price on request MA911B/2 Double junction pH electrode MA911B/2 Price on request MI56P pH/Temp probe for pH55 and pH56 Price on request